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| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2013-11-06 17:12:30 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-04 00:30:15 +0100 |
| commit | 965aeb4df1f2142f5a6407c6d40b7196be719582 (patch) | |
| tree | af2929e315bccfef7f94f56a8bc0c1b4f1eed23b /drivers/dma | |
| parent | dmaengine: omap-dma: improve efficiency loading C.SA/C.EI/C.FI registers (diff) | |
| download | linux-dev-965aeb4df1f2142f5a6407c6d40b7196be719582.tar.xz linux-dev-965aeb4df1f2142f5a6407c6d40b7196be719582.zip | |
dmaengine: omap-dma: move clnk_ctrl setting to preparation functions
Move the clnk_ctrl setup to the preparation functions, saving its
value in the omap_desc. This only needs to be set once per descriptor,
not for each segment, so set it in omap_dma_start_desc() rather than
omap_dma_start().
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/omap-dma.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 06727a78e883..49609275b2e7 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -59,6 +59,7 @@ struct omap_desc { int16_t fi; /* for OMAP_DMA_SYNC_PACKET */ uint8_t es; /* CSDP_DATA_TYPE_xxx */ uint32_t ccr; /* CCR value */ + uint16_t clnk_ctrl; /* CLNK_CTRL value */ uint16_t cicr; /* CICR value */ uint32_t csdp; /* CSDP value */ @@ -187,18 +188,6 @@ static void omap_dma_start(struct omap_chan *c, struct omap_desc *d) else c->plat->dma_write(0, CDAC, c->dma_ch); - if (!__dma_omap15xx(od->plat->dma_attr) && c->cyclic) { - val = c->plat->dma_read(CLNK_CTRL, c->dma_ch); - - if (dma_omap1()) - val &= ~(1 << 14); - - val |= c->dma_ch | CLNK_CTRL_ENABLE_LNK; - - c->plat->dma_write(val, CLNK_CTRL, c->dma_ch); - } else if (od->plat->errata & DMA_ERRATA_PARALLEL_CHANNELS) - c->plat->dma_write(c->dma_ch, CLNK_CTRL, c->dma_ch); - omap_dma_clear_csr(c); /* Enable interrupts */ @@ -330,6 +319,7 @@ static void omap_dma_start_desc(struct omap_chan *c) c->plat->dma_write(0, cxei, c->dma_ch); c->plat->dma_write(d->fi, cxfi, c->dma_ch); c->plat->dma_write(d->csdp, CSDP, c->dma_ch); + c->plat->dma_write(d->clnk_ctrl, CLNK_CTRL, c->dma_ch); omap_dma_start_sg(c, d, 0); } @@ -645,6 +635,8 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( } if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING) d->ccr |= CCR_BUFFERING_DISABLE; + if (od->plat->errata & DMA_ERRATA_PARALLEL_CHANNELS) + d->clnk_ctrl = c->dma_ch; /* * Build our scatterlist entries: each contains the address, @@ -725,8 +717,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( d->sglen = 1; d->ccr = 0; - if (__dma_omap15xx(od->plat->dma_attr)) - d->ccr = CCR_AUTO_INIT | CCR_REPEAT; if (dir == DMA_DEV_TO_MEM) d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT; else @@ -772,6 +762,11 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING) d->ccr |= CCR_BUFFERING_DISABLE; + if (__dma_omap15xx(od->plat->dma_attr)) + d->ccr |= CCR_AUTO_INIT | CCR_REPEAT; + else + d->clnk_ctrl = c->dma_ch | CLNK_CTRL_ENABLE_LNK; + c->cyclic = true; return vchan_tx_prep(&c->vc, &d->vd, flags); |